Treenail-turning machine



(No Model.)

P. LIGHTBODY.

TREE-NAIL TURNING MACHINE. No. 249,960. Patented Nov. 22,1881.

WITNESSES MM 2 Attorney UNITED STATES PATENT OFFICE.

FRANCIS LIGHTBODY, OF BATH, MAINE.

TREENAlL-TURNING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 249,960, dated November 22, 1881.

Application filed September 17, 1881.

To all whom it may concern Be it known that I, FRANCIS LIGHTBODY, of Bath, in the county of Sagadahoc and State Maine, have invented a new and useful Improvement in Treenail-Turnin g Machines 5 and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention relates to a machine for making treenails or wooden bolts used principally in ship-building, in place of metal bolts, for securing timbers together.

The object of my invention is to produce these bolts rapidly and cheaply bya simple and effective mechanism.

My invention consists in @ombining with a revolving chuck adapted to receive the bolt a longitudinally-movin g cross-head carrying a cutter; further, in the mechanism for giving motion to the chuck and cross-head and, finally,in various details of construction, more fully hereinafter explained.

In the accompanying drawings, Figure l is a side elevation, and Fig. 2 a plan view. Fig.3 is a detail view of the cutter-slide.

A represents a table, supported by standards 1 1, and having near one end bearings 2 2, for a shaft, B. The shaft B has atone end a wheel, 0, with a crank handle, 3, and-at the other a fly-whee], D.

Upon shaft B, about midway between the beams 4. 4, that form the side pieces of table A, is keyed a beveled-gear wheel,E, which meshes with another beveled wheel, F, on-the end of a shaft, G. The shaft G turns in bearings 5 5 in cross-pieces 6 6; and at the end opposite the wheel F is a chuck, H, to receive and hold the treenail while being turned. The turning of the wheel 0 and shaftB gives a rotary motion to the shaft G and chuck.

Upon the shaft G is a worm, I, which meshes with a spur-wheel, J, mounted on a shaft, L, and this shaft L also carries a drum, M, on which is wound a belt or chain, 7. At the end of shaft L is a crank, S. Alever,m,is pivoted at 9 to the frame, and is also secured to the shaft L. A post, 0, forming the bearing of the shaft on that side, is vertically adjustable on a pin in its slotted upper end, and by this and lever m wheel J is thrown into and out of gear. The lever is adapted to engage with a trip-catch, 10, pivoted to the frame.

Sliding on guides 11 11 is a cross head, N,

(No model.)

to which is secured one end of the chain 7. This cross-head consists of a central cylindrical portion, 12, the wings 13, which run in the guides, the knife 0, screwed to one of the wings, and screw 14, for adjusting the size of the opening 12 to fit the desired size of bolt.

In the operation of the device, one end of the trecnail is placed in the chuck and the other in the cylinder 12. Motion is imparted to the chuck by turning the crank on wheel B, or by suitable power-connections,which gives arapid rotary motion to the chuck. The worm on shaft G revolves the shaft L and drum M. The revolution of the latter winds up the belt and draws the cross head forward, the treenail turning against the knife and being reduced to the size indicated by the adjusting-screw. When the turning is accomplished the crosshead trips the lever 10 and the shaft L drops, disconnecting the worm-gear and stopping the drum without stoppingthe driving mechanism. The cross-head is then drawn back and another treenail inserted, the gear connected by raising the lever, and the operation repeated.

It will be seen that the treenails are finished without stopping the machine, the only movement being that of the lever in connecting and disconnecting the gear.

I am aware that the patent of S. D. Carpenter, dated March 31, 1874, describes devices for cutting veneers from a log, wherein thelog is held in a chuck revolved by suitable gearing and operated on by a cutter carried by a slide, which cutter and slide are fed forward to the log by a weighted cord; and also a reversing mechanism connected to the main gearing for retracting the cutter, the forward feed of the cutter beingindependentoftheoperatinginechanism.

Having thus described my invention, what- I claim is- 1. The described machine forlforming treenails from blanks, consisting of a chuckmounted on a shaft, G, for carrying the blank, gearin g for causing said chuck to revolve, a transverse shaft, L, carrying a drum, M, and operated through a spur-wheel, J, by the revolution of shaft G, all in combination with a sliding cutter-head connected to the said drum by a belt, whereby the revolution of the chuck and blank accomplishes also the positive feeding of the cutter to the said blank.

2. In a machine for forming treenails, the In testimony whereof I have signed my name combination, with the shaft G, having the to this specification in the presence of two worm I, of the vertically-adjustable shaft L and. subscribing witnesses. the spur-Wheel J, and the drum M, connected 1 5 to the sliding cutter-head. FRANCIS LIGH'IBODY.

3. In a machine for forming treenails, the combination of the sliding cutter-head, the Witnesses: shaft G, having the worm I, the vertically-ad J. L. DOUGLAS, justable shaft L, having the spur-wheel J, the H. A. DUNCAN.

1o pivoted lever m, and the trip-catch 10. 

